This is the character list of 2019 Ultra Series Ultraman Taiga. Starting with September 29, 2019, the show coincided its airing with YouTube-exclusive miniseries Ultra Galaxy Fight: New Generation Heroes.

E.G.I.S. The , abbreviated as , is a private security organization which handles alien-related cases on a daily basis.

Hiroyuki Kudo is the 22-year-old protagonist who has a kind personality and strong sense of justice, dreaming of becoming a bridge between humankind, aliens and Ultramen.

As a child, Hiroyuki tried to save Chibisuke from the Lecuumm alien but was rescued by Taiga's wandering particles of light to survive his fall. During his adulthood and membership in E.G.I.S., Hiroyuki was given the means to become Taiga during combat and eventually two other members of Tri-Squad that made their way to Earth. After his attempt in freeing Taiga from Tregear's corruption, he was accepted as the honorary member of the Tri-Squad. In the final episodes, Hiroyuki's double life as a Tri-Squad member was revealed to have been known by Kana and Homare, both of them chastise him for his poor attempt in keeping secret.

In Ultraman Taiga The Movie, Hiroyuki becomes the target of the Villain Guild, which led to the members of New Generation Heroes appearing one after another to protect him. Hiroyuki became reckless in the fight, which resulted in Taiga's concern for the youth.

Hiroyuki Kudo is portrayed by . As a child, Hiroyuki is portrayed by .

Homare Soya is a 25-year-old member with a sense of justice and is faithful to any given mission. He is Hiroyuki's senior and is often enraged when the former ran away in important missions. As he often took on dangerous tasks, Homare puts his high physicality to use while usually partnering with Hiroyuki.

In his past, Homare was actually an banished from his homeworld and made his reputation as a renowned fighter in an alien gang. He provided refuge to an outcast Volk and joined the Villain Guild at a very young age but quit it after finding a new resolve in his life, which led to his membership in E.G.I.S.. Despite his human-like appearance, Homare displays several of his alien physicality, including the ability to jump from high places and break free from metal chains.

Homare Soya is portrayed by .

Pirika Asahikawa is a 23-year-old operator who is capable of handling cyber security-related cases. Although usually did her job from the office, she can also participate in outside missions, having did so to replace Hiroyuki due to his arm injury.

Her true identity is an android named , one of the many androids created by scientists of that went scattered to eliminate Woola at the cost of their own well-being. She was discovered by Kana 7 years prior to the series and was given a place in E.G.I.S.. After her boss Kana was rescued from Gorothunder, Kirisaki attempts to harass her in order to spite Hiroyuki but switched plans by summoning Woola after probing through Pirika's mind. Fully aware of her mission, Pirika used the Villain Guild's to digitize herself, only to discover the planet eater was only troubled by its own existence. Because of this, she instructed E.G.I.S. in an operation to satiate its hunger. Although seemingly killed in Woola's explosion, Taiga managed to salvage at least her memories and inspector Sakura contacted former residents of Planet Eomapp to provide a spare body for her, allowing Pirika to be restored and reunited with E.G.I.S..

In Ultraman Taiga The Movie, Pirika was infected by a virus during her undercover in the alien hideout. She was saved by Daichi Ozora, who lost his ability to unite with X.

Pirika Asahikawa is portrayed by , who replaces from the same talent agency due to the latter's scheduling conflict.

Kana Sasaki is the 38-year-old president of E.G.I.S., whose previously worked as a police officer in . After her failure to protect a Cicada Girl from being delivered to a research lab from a murder case, Kana left her job to establish E.G.I.S. She puts up a rather playful facade but shows a serious attitude when handling an alien case and is observant of her workers. Additionally as a result from her past trauma, Kana becomes dedicated to help both human and aliens alike, going as far as to give the former Villain Guild aliens Homare, Magma and Merkind and the android Pirika a membership in E.G.I.S.. Alongside Homare, Kana was already aware of Hiroyuki's double life as the Tri-Squad but keeps it to herself until the final battle with Woola.

In Ultraman Taiga The Movie, Kana lead the E.G.I.S. members in an undercover operation within the Villain Guild's hideout. There, she found herself under allying with Gai Kurenai.

Kana Sasaki is portrayed by .

Alien Magma is a former member of Villain Guild who kidnapped the Baby Zandrias as a leverage to call its mother in a fight against their Zegun, forced to fall back when Zegun was killed by Hellberus. After Zolin's arrest and Woola's arrival, Magma and Merkind attempted to leave Earth but changed their mind after being inspired by Pirika's bravery, offering their assistance to E.G.I.S. in an operation to neutralize Woola. Magma rode his alongside Homare to launch a white hole missile, therefore allowing Taiga to free the monster from its own existence. As a result of their cooperation, both aliens were given membership in E.G.I.S. by Kana.

In Ultraman Taiga The Movie, Alien Magma was injured from E.G.I.S.'s fight with Dada's team of Villain Guild. He was absent during the New Generation Heroes' fight with Tregear, but assisted Homare off-camera to provide a map of the possessed-Taro's locations.

Alien Magma is voiced by , his species first appearing in episode 1 of Ultraman Leo.

Alien Merkind is a former auctioneer of Villain Guild, responsible for selling the group's captured monsters to the highest bidders. Although not appeared, Merkind was responsible for purchasing the Monster Bomb Darebolic alongside the Alien Zetton "Zolin". At some point after Zolin's capture and Pirika's digitization into Woola's body, Merkind and Alien Magma offer their assistance, wherein the former took over Pirika's position as the analyzer of E.G.I.S.' attempt to satiate Woola. His involvement earned him a membership in E.G.I.S. by Kana at the end of the series, currently working as the team's accountant.

Merkind was present during the cold opening of Ultraman Taiga The Movie, but was absent during the New Generation Heroes' fight with Tregear.

Alien Merkind is voiced by , his species first appearing in episode 3 of Ultraseven X.

Ultra Warriors Tri-Squad The is a trio of Ultramen with different origins who join forces to preserve peace in space. Initially thought to have killed by Tregear, their scattered lights wandered in outer space as they reunite on Earth bonding with the same host, Hiroyuki.

Hiroyuki transforms into either one of them through the , an item which was developed by Ultraman Taro and Tregear and was originally his . The item functions by scanning , each with different results: : Represents the Tri-Squad's transformations. : Powers of past Ultra Warriors, specifically the New Generation Heroes. It functions by empowering the Tri-Squad's finishing techniques. : Also called as , it was created from remains of defeated monsters. Its mainly used by Taiga to tap into the monster's own power, but was carefully planned by Tregear as a way of influencing him through slow corruption.

Ultraman Taiga is the eponymous Ultraman who is the son of Ultraman Taro and is also known as the . Although the founder and leader of Tri-Squad, he yearns for his father's respect and grows to become a proper hero despite his youthful age, 4,800 years old.

In his younger days, Taiga found solace in the blue Ultra named Filis and trains harder after being overshadowed by his father's popularity. During his journey in outer space, he join forces with Andro Ares in Planet Maiji to fight against Imbeeza's platoon of Gua Army. He would soon meet Titas and Fuma within their respective homeworlds, which resulted in the formation of Tri-Squad. Following his defeat by Tregear, Taiga's particles of light wandered in space-time continuum and bonded with Hiroyuki to save the boy from a great fall. As his body recuperated in the span of 12 years, Taiga reveal himself to save the Zandrias family from Hellberus while dedicating his life to save Earth from multiple threats. Taiga grew stronger with his own set of powers, but slowly fell into the corruption induced from prolonged use of the Monster Rings. He was rescued by Hiroyuki and eventually gains a new form, Tri-Strium, as a result. After the battle against Woola, Taiga offered Tregear a chance of redemption, but was rejected and forced to defeat him with Quattro Squad Blaster.

At some point later on, Taiga found himself facing against his corrupted father and dealt with a reckless Hiroyuki. Riku give the Ultra an advice of facing one's father, and that only their son that could save them.

Taiga's fighting skill is balanced and utilizes the same stance as his father. His finisher is . After being given the by Zero, Taiga and any of his forms can augment Zero's abilities to his own; , and . Taiga would later gain access to other forms in the series progress: : Taiga's power-up form, which he obtained through Ai Tennoji's help. His personal Key Holder was upgraded into as Hiroyuki scans it thrice and empowers the Ultra with the energy of the Earth and Sun. Declaring himself as the , his body color becomes predominantly black and dons a set of gold and silver armor. His finisher in this form is . : Taiga's strongest form also known as the when Hiroyuki accessed the , combining with the rest of the Tri-Squad members and his human host. Taiga obtains the sword named , allowing him to utilize enhanced versions of the Tri-Squad members' finishing moves or his independent attack, .

Ultraman Taiga is voiced by .

Ultraman Titas is the 9,000-year-old from Planet U40, the birthplace of Ultraman Joneus. Unlike the rest of his kind, Titas is actually the son to a pair of Heller's Soldiers as he was jettisoned to the Planet U40 by his father, who wanted his son to follow a different path. During the Ultra People's final stand against the Heller Empire, Titas was hesitant in initiating Ultra Change until the death of Matia triggered his first transformation and killed the monster Kishiadar. Titas met Taiga when the latter visited U40 and later on forms the Tri-Squad after Fuma joined them.

Following his defeat from Tregear, Titas' particles of light roamed in outer space and assisted the spirit of Nana Kujō to stop her vengeful husband from destroying Cozmo Technica. After fulfilling her wish and stopping Galactron MK2, Titas bonded with Hiroyuki as he reunited with Taiga.

With his carefully trained body and healthy spirit, Titas is skilled in heavyweight battles. Being an Ultra Person of U40, Titas bears a that he obtained by the Great Sage but operates normally like a Land of Light Ultra's Color Timer. His black coloration is said to be a remnant from his Anti-Ultra Humanoid origin. His finisher is . In the Voice Drama, Titas originally transformed with his race's Beam Flasher before he acquired his copy of Taiga Spark.

Ultraman Titas is voiced by .

Ultraman Fuma